http://www.w3.org/TR/2001/WD-css3-box-20010726/#the-margin :
|
| 'Margin-inside' and 'margin-outside' are aliases for 'margin-left' or
| 'margin-right', depending on the current medium:
|
| * in paged media [link], 'margin-inside' sets 'margin-left' for those
| parts of an element that fall on a right-hand page and 'margin-right'
| for the parts on a left-hand page. 'Margin-outside' is the reverse
Given
element {
margin-left: 1em;
margin-inside: 0;
}
[attribute] {
margin-outside: 2em;
margin-right: .5em;
}
and
<element attribute="number">
Contents of 'element'
</element>
and
element falls on the left-hand page
1. How wide are the margins?
1.a. How do you know?